I've been feeling nausea for over a month and a half. Feeling tired all the time too. I went to the doctor thinking i mite be pregnant but my results were negative. I also did a first response three weeks ago and it was also negative. But i my breast are sore sometimes and its never sore. I also been having unprotected intercourse with my boyfriend for over 6 months. Its just so werid. I was three weeks early for my period two months ago and i just had a light period two weeks ago. I don't know what's wrong with me?